11•45-224:14-336:8

To calculate this expression:

11 • 45 - 224 : 14 - 336 : 8

First, let's perform the divisions:

11 • 45 - 16 - 42

Then, let's perform the multiplications:

495 - 16 - 42

Finally, let's perform the subtractions:

(495 - 16) - 42 = 479 - 42 = 437

So, the result is 437.